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' Text Predictions ) search }3 Search = Design Layout References Mailings Review View Help e ‘ SR i bl 1 ] \ €| = ' R =L 2 l 2l | ¥ AaBbCcDc|l AaBbCcD AaBbC AaBbCcr Aab b sl 2 O A E]— 1 Normal | s Heading 1 d ]| S Repee bl ~ ~ s I i i i e | O0Py | Heading || Heading2. | Title I Select ~ N Paragr_aph [ Styles N Editing U IIIU\IGS?HWHV THOTIT e 0L 20 neWIere ongmaltear wiys X " As a slab of seafloor moves away from the rift zone where plates become thicker and 2 it originated. In plate tectonic theory the more dense, 50 the plates are formed \atithe rift zone by upwelling mamgma filling in as the plates move apart. 20. Use the Ruler tool to determine the distance from the rift zone where the seafloor originated to the trench where it is being subducted at each of the three locations studied in this exploration.* Location Distance from rift/origin Cascadia Margin Coast of Central America Aleutian Islands = *1f you are having trouble identifying the origin region, you can turn on the Hint at each location by checking the box next to it in the Places sidebar. 21. Describe and explain the relationship you’ve observed between the age of a subducted plate, and the descent angle of the subduction of that plate. Onl | T Accessibility: Good to go ’f\ on B0 A O ® . s | (= comments ] 7 com @J —[' Dictate | Edif o) Voice Editor | g